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  <title>八进制转换为十进制</title>
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  <div id="layout-content"><div id="function.octdec" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">octdec</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">octdec</span> &mdash; <span class="dc-title">八进制转换为十进制</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.octdec-description">
  <h3 class="title">说明</h3>
   <div class="methodsynopsis dc-description">
    <span class="methodname"><strong>octdec</strong></span>(<span class="methodparam"><span class="type">string</span> <code class="parameter">$octal_string</code></span>): <span class="type"><span class="type">int</span>|<span class="type">float</span></span></div>

  <p class="para rdfs-comment">
   返回 <code class="parameter">octal_string</code>
   参数所表示的八进制数的十进制等值。<code class="parameter">octal_string</code>
   中的任何无效字符都会默认忽略。自 PHP 7.4.0 起，弃用使用任何无效字符。
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.octdec-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">octal_string</code></dt>

     <dd>

      <p class="para">
       要转换的八进制的字符串。
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.octdec-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   <code class="parameter">octal_string</code> 的十进制的表示
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.octdec-changelog">
  <h3 class="title">更新日志</h3>
  <table class="doctable informaltable">
   
    <thead>
     <tr>
      <th>版本</th>
      <th>说明</th>
     </tr>

    </thead>

    <tbody class="tbody">
     <tr>
      <td>7.4.0</td>
      <td>
       传递任何无效字符现在将生成弃用通知。但仍会计算结果，就好像无效字符不存在一样。
      </td>
     </tr>

    </tbody>
   
  </table>

 </div>


 <div class="refsect1 examples" id="refsect1-function.octdec-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-3101">
    <p><strong>示例 #1 <span class="function"><strong>octdec()</strong></span> 例子</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">echo&nbsp;</span><span style="color: #0000BB">octdec</span><span style="color: #007700">(</span><span style="color: #DD0000">'77'</span><span style="color: #007700">)&nbsp;.&nbsp;</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo&nbsp;</span><span style="color: #0000BB">octdec</span><span style="color: #007700">(</span><span style="color: #0000BB">decoct</span><span style="color: #007700">(</span><span style="color: #0000BB">45</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
63
45
</pre></div>
    </div>
   </div>
  </p>
 </div>

 <div class="refsect1 notes" id="refsect1-function.octdec-notes">
  <h3 class="title">注释</h3>
  <blockquote class="note"><p><strong class="note">注意</strong>: 
   <p class="para">
    此函数可以将太大的数字转换为适应平台的 <span class="type">int</span> 类型，在这种情况下，较大值将会作为
    <span class="type">float</span> 返回。
   </p>
  </p></blockquote>
 </div>

 <div class="refsect1 seealso" id="refsect1-function.octdec-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.decoct.html" class="function" rel="rdfs-seeAlso">decoct()</a> - 十进制转换为八进制</span></li>
    <li class="member"><span class="function"><a href="function.bindec.html" class="function" rel="rdfs-seeAlso">bindec()</a> - 二进制转换为十进制</span></li>
    <li class="member"><span class="function"><a href="function.hexdec.html" class="function" rel="rdfs-seeAlso">hexdec()</a> - 十六进制转换为十进制</span></li>
    <li class="member"><span class="function"><a href="function.base-convert.html" class="function" rel="rdfs-seeAlso">base_convert()</a> - 在任意进制之间转换数字</span></li>
   </ul>
  </p>
 </div>

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